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Bioinspired perovskite quantum dots microfibers from microfluidics
Science China Materials ( IF 6.8 ) Pub Date : 2021-06-23 , DOI: 10.1007/s40843-021-1675-x
Yunru Yu , Jiahui Guo , Feika Bian , Dagan Zhang , Yuanjin Zhao

As perovskite quantum dots (PeQDs) are performing their outstanding characteristics, incremental efforts have been devoted to such materials. Here, inspired by the spider spinning process, we present novel PeQDs microfibers with tailorable morphologies and functions from a multi-injection microfluidic approach. The microfibers were generated by introducing PeQDs precursors into each barrel of the inner capillary array and mixing them in the spindle middle channel, where the poly(vinylidene fluoride) (PVDF) dissolved in N,N-dimethyl formamide (DMF) was also injected as their sheath fluid. During this process, the PeQDs were in situ synthesized with the connection of precursor cations and anions in the core fluid; while the PVDF formed solidified microfibers to encapsulate PeQDs with the fast dispersion of DMF into the outer aqueous solution. Thus, the good encapsulation of PeQDs was achieved in PVDF microfibers, which effectively protected them from different hostile environments. Because of the highly tunable spinning processes, the microfibers exhibited controllable diameters and helical geometric structures, and the encapsulated PeQDs could yield adjustable emission peaks. Based on the PeQDs microfibers, we have explored their potential as luminescent materials in barcodes and as flexible photodetectors, which make such microfibers highly versatile for different areas.



中文翻译:

来自微流体的仿生钙钛矿量子点微纤维

由于钙钛矿量子点 (PeQD) 正在发挥其出色的特性,因此越来越多的努力致力于此类材料。在这里,受蜘蛛纺纱工艺的启发,我们通过多注射微流体方法展示了具有可定制形态和功能的新型 PeQDs 微纤维。微纤维是通过将 PeQDs 前体引入内部毛细管阵列的每个桶中并在主轴中间通道中混合它们而产生的,其中溶解在NN-二甲基甲酰胺(DMF)中的聚(偏二氟乙烯)(PVDF)也被注入作为他们的鞘液。在这个过程中,PeQDs在原位由核心流体中的前体阳离子和阴离子连接合成;而 PVDF 形成固化的微纤维以封装 PeQD,DMF 快速分散到外部水溶液中。因此,在 PVDF 微纤维中实现了 PeQD 的良好封装,有效地保护了它们免受不同恶劣环境的影响。由于纺丝工艺高度可调,微纤维表现出可控的直径和螺旋几何结构,封装的 PeQD 可以产生可调的发射峰。基于 PeQDs 微纤维,我们探索了它们作为条形码发光材料和柔性光电探测器的潜力,这使得这种微纤维在不同领域具有高度的通用性。

更新日期:2021-06-23
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